HARMONIX

The Design Philosophy Behind HARMONIX®

Most suppressor designs optimize for a single metric—maximum sound reduction, minimum weight, or maximum durability—and accept the trade-offs that come with that choice. HARMONIX® was designed differently. The goal from the start was to create a suppressor that balanced low backpressure with excellent sound suppression while maintaining a compact form factor that could benefit the most possible shooters on the most possible platforms.

That balance starts with the baffle stack. Faxon’s proprietary baffle geometry uses additive manufacturing (3D printing) to create internal structures that would be impossible with traditional machining—optimizing gas flow to reduce sound at the muzzle while minimizing the backpressure that causes excess gas blowback to the shooter. The design was so effective that Faxon later incorporated the same baffle geometry into the CORESYNC® modular suppressor line, where it serves as the foundation for a multi-caliber, user-serviceable platform.

Every HARMONIX® suppressor—regardless of material tier or caliber—shares the same external dimensions (6.75″ long, 1.675″ max OD, 1.5″ wrench flats), the same internal baffle design, and the same HUB mount interface. That means sound performance is consistent across the entire lineup. What changes between models is the material, the manufacturing method, and the resulting weight and durability characteristics.

Engineering the Baffle Stack

Suppressor performance ultimately comes down to how efficiently the baffle stack converts high-pressure propellant gas into heat. Every time gas changes direction, expands into a chamber, or passes through a restriction, it loses energy. The more energy you extract before gas exits the muzzle, the quieter the suppressor. The challenge is doing that without creating excessive backpressure that pushes gas rearward into the shooter’s face and the firearm’s action.

The HARMONIX® baffle stack addresses this with several design features that are only possible through additive manufacturing:

Three Material Tiers — One Baffle Design

HARMONIX® gives you three ways to build the same suppressor, each optimized for a different balance of weight and durability. Because all three tiers share identical baffle geometry, sound suppression is the same across ION, Ti•CONEL®, and Sentry—the difference is how much abuse the suppressor can take and how much it weighs on the end of your rifle.

Independent Testing: 2025 Thunderbeast Silencer Summit

The Thunderbeast Silencer Summit is one of the most rigorous independent suppressor testing events in the industry. Organized and conducted by Thunder Beast Arms Corporation (TBAC), it uses standardized test protocols with calibrated measurement equipment across multiple cartridges and barrel configurations. Every suppressor is tested under identical conditions—same ammunition, same host firearms, same measurement positions (Muzzle Left, Muzzle Right, and Shooter’s Ear)—making it one of the few events where you can directly compare suppressors from different manufacturers on a level playing field.

At the 2025 summit, the HARMONIX® platform was tested across five cartridge categories at three measurement positions: Muzzle Left (ML), Muzzle Right (MR), and Shooter’s Ear (SE). The Shooter’s Ear position is particularly relevant to real-world use—it measures what the person behind the rifle actually hears. Here are the highlights:

The standout result: in 9mm, the HARMONIX® Sentry 36 took two first-place finishes at the Shooter’s Ear position out of all 22 suppressors tested—#1 in both dB (133.20) and peak pressure (91.45 Pa), lower than every dedicated 9mm can in the field. At the Shooter’s Ear dB(A)-weighted position (which approximates human hearing sensitivity), it ranked #2 out of 22, just 0.38 dB(A) behind first place. Across all three measurement positions in 9mm, the Sentry 36 placed in the top 7—every single metric. These results are especially notable because the HARMONIX® achieved this not with a dedicated pistol suppressor but with a multi-caliber rifle can running 9mm through its .36 Cal bore.

In 5.56—the largest field at the summit with 86 suppressors—the HARMONIX® Sentry 5.56 placed #5 at Muzzle Right (140.84 dB), #7 at both Muzzle Left and Muzzle Right in A-weighted decibels (132.55 and 136.19 dB(A)), and #8 at Muzzle Left (139.05 dB). The dB(A) results are particularly meaningful—A-weighting filters the measurement to match human hearing sensitivity, so these numbers closely approximate what the shooter actually perceives. Seven out of the top 10 results in a field of 86, from a 6.75″ suppressor that’s shorter than most of its competition.

Why Internal Volume Matters—and Why HARMONIX® Punches Above Its Weight Class

In suppressor engineering, internal volume is one of the most significant factors in raw sound reduction. A larger suppressor gives propellant gas more space to expand and cool before exiting the muzzle. All else being equal, a longer and wider can will almost always measure quieter than a shorter and narrower one—the physics of gas expansion guarantee it. This is why the suppressors that top the charts at events like the Silencer Summit tend to be physically larger than the ones below them.

When you look at the HARMONIX®’s summit results through the lens of internal volume, the performance becomes even more impressive:

5.56 NATO — Muzzle Left (86 Suppressors)

The seven suppressors that outranked the HARMONIX® in 5.56 had an average internal volume of 19.8 cubic inches—32% more volume than the HARMONIX®’s 15.0 ci. Several were 40–63% larger. Despite that significant size disadvantage, the HARMONIX® measured just 0.67 dB louder than the top-7 average (139.05 vs. 138.38 dB). In other words, the suppressors that beat the HARMONIX® needed a third more internal volume to gain less than a single decibel of additional suppression.

.308 Win — Muzzle Left (71 Suppressors)

The same pattern holds in .30 caliber testing. In the .308 Win category (20″ bolt action, 71 suppressors), every suppressor that outranked the HARMONIX® Sentry 30 was physically larger—most of them substantially so:

The #1 suppressor in .308 had 66% more internal volume than the HARMONIX®. The #4 had literally twice the volume. The #8 had 115% more. These are 9–10″ long suppressors with 1.75–1.97″ diameters competing against a 7.13″ × 1.64″ can. The HARMONIX® isn’t losing to better baffle designs—it’s competing against suppressors with dramatically more internal volume, and its baffle geometry extracts more suppression per cubic inch of available space than nearly anything in the field.

This is the direct result of the engineering decisions described above: the angular baffle geometry, progressive expansion staging, and low-backpressure balance all work together to maximize the energy extracted from propellant gas within a 6.75″ × 1.675″ envelope. You could build a quieter suppressor by making it longer or wider—but you’d also be adding length to your rifle, weight to your muzzle, and bulk under your handguard. The HARMONIX® was designed to deliver the best possible performance in a form factor that works on the widest range of rifles without compromise.

Data recorded and provided by Thunder Beast Arms Corporation (TBAC). All measurements taken under standardized conditions. Estimated internal volume calculated from published OD and length; actual internal volume varies by baffle design. Full summit data available at thunderbeastarms.com. Faxon Firearms is not affiliated with TBAC.

Choose Your Caliber: 5.56 • .30 Cal • .36 Cal

Every HARMONIX® material tier is available in three bore sizes. All share the same external dimensions, the same weight (within each tier), and the same mount interface—the only difference is bore diameter and the Direct Thread HUB Adapter that ships in the box.

Shop All HARMONIX® Suppressors

How HARMONIX® Pricing Compares

The HARMONIX® lineup is priced competitively with—and often below—the suppressors it competes against at the Silencer Summit and in the broader market. Here’s how the three tiers stack up against comparable models from other manufacturers:

The Ti•CONEL® at $1,050 is the price-to-performance standout. It costs less than the Abel Theorem, Dead Air RXD30Ti, SilencerCo Omega 36M, and nearly $800 less than the TBAC Magnus—while delivering independent summit-tested performance that puts it in the same conversation. Even the all-titanium ION at $975 undercuts most titanium competitors while coming in at a form factor (6.75″, 7.84 oz) that none of them match. And the full-superalloy Sentry at $1,099 offers belt-fed-rated durability at a price point where most competitors are selling titanium or stainless steel.

Competitor MSRPs sourced from manufacturer websites and authorized retailers as of May 2026. Prices may vary by mount configuration and retailer. Weights shown without mounts where available.

Shared Specifications — All HARMONIX® Models

Mounting: HUB Mount & MuzzLok® Plan B Compatible

All HARMONIX® suppressors use the Faxon HUB mount interface. Each ships with a Direct Thread HUB Adapter matched to the caliber’s thread pitch. For quick-detach capability, pair any HARMONIX® with a MuzzLok® Plan B Compatible muzzle device—attach and detach the suppressor in seconds without tools.

Manufacturing & Quality

Faxon Firearms is an ISO 9001:2015 certified manufacturer headquartered in Greater Cincinnati, OH. Every HARMONIX® suppressor is additively manufactured using aerospace-grade materials, finished with a high-temperature ceramic coating, and serialized with individual inspection before leaving the facility. The same engineering team that designs Faxon’s barrels, bolt carrier groups, and complete firearms is behind every suppressor in the lineup—and every HARMONIX® is made in the USA.

Tax Stamp & Purchase Process

Suppressors are regulated under the National Firearms Act (NFA). You’ll need to submit an ATF eForm 4 through a licensed dealer to take possession. The $200 tax stamp fee has been eliminated, but the eForm 4 approval process is still required. Your dealer can walk you through the paperwork at the time of purchase—it’s straightforward, and current eForm 4 processing times are significantly faster than they were a few years ago.

Care & Cleaning

All HARMONIX® suppressors are additively manufactured and share the same care guidelines. Centerfire rifle suppressors accumulate less fouling than rimfire or pistol cans, but periodic cleaning extends the life of any suppressor. Ultrasonic cleaning with a titanium-safe solution is the recommended method—avoid highly alkaline cleaners that can damage the ceramic coating. For specific product recommendations, contact Faxon Customer Service.

Frequently Asked Questions

HARMONIX® in Action

HARMONIX®, Ti•CONEL®, Where Suppression Meets Equilibrium®, CORESYNC®, and MuzzLok® are registered trademarks of Faxon Firearms. All summit test data recorded and provided by Thunder Beast Arms Corporation. Faxon Firearms is not affiliated with TBAC.